On a machine with internet access, go to the Tenable Offline Activation Page. Paste your into the first box. Paste your Reset Activation Code into the second box. Click Submit . The portal will now successfully generate two things:
When you submit these to the Tenable plugins portal, the system pairs them together. If you see the "License already in use" error, it means the Tenable license server has a record of that Activation Code being linked to a different Challenge Code. Common scenarios that trigger this conflict include: nessus offline activation license already in use
Are you performing a , or are you trying to transfer an existing license to a different offline server? Update License Offline (Tenable Nessus 10.11) On a machine with internet access, go to
If you need immediate scanning, consider switching to (free up to 16 IPs) while waiting for Tenable support to reset your license. Click Submit
With your license reset on the portal and a fresh challenge string in hand, you can now complete the offline activation without errors.
Once you have resolved the issue, take these precautions to prevent it from recurring:
Make it a standard operating procedure (SOP) to run the nessuscli fix --reset command before deleting a virtual machine or wiping a server.